Fig. 5

Numbers of colony-forming cells from synovium. A The number of nucleated cells per gram of synovium. Data are presented as the mean ± SD of three knees. B Representative images of cell colonies stained with crystal violet. C The numbers of colony-forming cells per dish and per gram of synovium. Data are presented as the mean ± SD of three replicate dishes. *p < 0.05, **p < 0.01, and ***p < 0.005